US Bridges

Csah 1 over Tamarac River

Good

Marshall County, Minnesota · 1.1 MI S of JCT Csah 6 · Structure no. 45519

Built
1973
52 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
113 ft
3 main spans
Daily traffic
310
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 1 over Tamarac River is a steel continuous stringer/multi-beam or girder carrying Csah 1 over Tamarac River in Marshall County, Minnesota. It was built in 1973, so it is 52 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 310 vehicles a day, projected to reach 305 by 2038. The structure is 113 ft (34.3 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesCsah 1
CrossesTamarac River
Location1.1 MI S of JCT Csah 6
RouteCounty Highway 1
Coordinates48.42628, -96.62781
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating27.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.3 m)
Longest span42 ft (12.8 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2018)
Projected traffic305 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 1 over Tamarac River built?

It was built in 1973, making it 52 years old in 2025.

What condition is Csah 1 over Tamarac River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Csah 1 over Tamarac River carry?

About 310 vehicles per day (2018 count).

How long is Csah 1 over Tamarac River?

The structure is 113 ft (34.3 m) long with a longest span of 42 ft (12.8 m) and a deck 36 ft wide.

Who owns Csah 1 over Tamarac River?

It is owned by the County Highway Agency.